Dear Paul, replying here on the public list,
thank you for raising this issue. We have discussed the relation between
Policy and Semantic Annotations briefly at our recent f2f meeting and we
came to the conclusion that we are attaching different things to WSDL,
even though both specs are general enough that they could be bent to
perform similar functions.
The major difference is in the intention of the attached information.
SAWSDL aims to enhance the description e.g. for discovery (even if on
the XML level the WSDL wouldn't match), whereas Policy aims show what
restrictions there are when the WSDL is followed e.g. in invocation.
I guess I could say the basic difference is similar to the difference
between XML Schema and OWL.
Regarding reviewing your material on Attachment in WSDL 2.0, we can do
that from the point of view of overlap, but there's no significant
overlap between SAWSDL and what is in your section 4 (attaching policies
using wsdl 1.1) which mostly talks about computing effective policy.
Outside section 4, any perceived overlap between your reference
mechanisms (PolicyReference element and PolicyURIs attribute) and ours
(modelReference attribute) is really only structural similarity with no
real space for unification.
To summarize, it seems there is little point in WS-Policy and SAWSDL
coordinating with each other, other than that both should check with
WS-Desc about extending WSDL 2.0 right.
Further discussion about possible overlap might be interesting in the
scope of the Semantic Web Services interest group, perhaps, as suggested
by Bijan.
Jacek
On Tue, 2006-09-05 at 11:27 -0700, Paul Cotton wrote:
> I raised this issue at the Web Services CG meeting today. Unfortunately the Chair of the SAWSDL WG and the team contact were not available due to other commitments.
>
> This email is to point out this issue to the SAWSDL WG Chair and team contact.
>
> This issue was raised by a member of the WS-Policy WG and asks if the WS-Policy WG and the SAWSDL WG need to coordinate since they are both discussing material that can be attached to a WSDL.
>
> The current WS-Policy Attachments WD [1] contains a section that describes how to attach web services policies to a WSDL 1.1 resource [2]. The WS-Policy WG is planning to add a section to this document that covers how to attach web services policies to a WSDL 2.0 resource.
>
> I would like to recommend that the SAWSDL WG review this new material which is related to WSDL 2.0 when it becomes available.
>
> /paulc
>
> [1] http://www.w3.org/TR/2006/WD-ws-policy-attach-20060731/
> [2] http://www.w3.org/TR/2006/WD-ws-policy-attach-20060731/#AttachingPolicyUsingWSDL1.1
>
> Paul Cotton, Microsoft Canada
> 17 Eleanor Drive, Ottawa, Ontario K2E 6A3
> Tel: (613) 225-5445 Fax: (425) 936-7329
> mailto:Paul.Cotton@microsoft.com
>
>
>
>
>
> > -----Original Message-----
> > From: public-ws-policy-request@w3.org [mailto:public-ws-policy-
> > request@w3.org] On Behalf Of Paul Cotton
> > Sent: August 25, 2006 12:33 PM
> > To: Bijan Parsia; public-ws-policy@w3.org
> > Subject: RE: NEW ISSUE: (3623) Relation of Attachment to SAWSDL
> >
> >
> > I have requested that this coordination item be discussed at a future Web
> > Services Coordination Group meeting. At that time I will request that the
> > SAWSDL WG review our initial WG drafts and inform us of any difficulties
> > they have using the documents.
> >
> > Chris or I will report back after the WS CG meeting occurs.
> >
> > /paulc
> >
> > Paul Cotton, Microsoft Canada
> > 17 Eleanor Drive, Ottawa, Ontario K2E 6A3
> > Tel: (613) 225-5445 Fax: (425) 936-7329
> > mailto:Paul.Cotton@microsoft.com
> >
> >
> >
> >
> >
> > > -----Original Message-----
> > > From: public-ws-policy-request@w3.org [mailto:public-ws-policy-
> > > request@w3.org] On Behalf Of Bijan Parsia
> > > Sent: August 25, 2006 6:49 AM
> > > To: public-ws-policy@w3.org
> > > Subject: NEW ISSUE: (3623) Relation of Attachment to SAWSDL
> > >
> > >
> > > Title -
> > > Relation of Attachment to SAWSDL
> > >
> > > Description -
> > > SAWSDL working group is defining a set of extensions to WSDL
> > > for
> > > attaching "semantic" information. Presumably, this includes policy like
> > > information.
> > > See:
> > > <http://www.w3.org/2002/ws/sawsdl/>
> > > <http://www.w3.org/2002/ws/sawsdl/spec/SAWSDL.html>
> > >
> > > Justification -
> > > They are a working group in an overlapping space. We should
> > > determine
> > > how much overlap there is.
> > >
> > > Target -
> > > attachment
> > >
> > > Proposal -
> > > I don't have one per se. I'm not an attachment or SAWSDL
> > > person. But at
> > > least the chairs perhaps should contact?
> >
>
>